2 SO2 + 8 HI → S2 + 4 I2 + 4 H2O
This is an oxidation-reduction (redox) reaction:
2 SIV + 8 e- → 2 S0 (reduction)
8 I-I - 8 e- → 8 I0 (oxidation)
SO2 is an oxidizing agent, HI is a reducing agent.
Reactants:
- SO2 – Sulfur dioxide
- Other names: Sulfurous anhydride , Sulphur dioxide , Sulfurous acid anhydride
- Appearance: Colorless gas ; Colourless gas or compressed liquefied gas with pungent odour ; Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.]
- HI – Iodane
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